<?php // $Id: history.php,v 1.14.4.2 2008/05/02 04:07:32 dongsheng Exp $
	  // For listing message histories between any two users
	  
	require('../config.php');
	require('lib.php');

	require_login();

	if (isguest()) {
		redirect($CFG->wwwroot);
	}

	if (empty($CFG->messaging)) {
		error("Messaging is disabled on this site");
	}

/// Script parameters
	$userid1 = required_param('user1', PARAM_INT);
	if (! $user1 = get_record("user", "id", $userid1)) {  // Check it's correct
		error("User ID 1 was incorrect");
	}

	if (has_capability('moodle/site:readallmessages', get_context_instance(CONTEXT_SYSTEM))) {			 // Able to see any discussion
		$userid2 = optional_param('user2', $USER->id, PARAM_INT);
		if (! $user2 = get_record("user", "id", $userid2)) {  // Check
			error("User ID 2 was incorrect");
		}
	} else {
		$userid2 = $USER->id;	// Can only see messages involving yourself
		$user2 = $USER; 
	}
	$search = optional_param('search', '', PARAM_CLEAN);

	add_to_log(SITEID, 'message', 'history', 'history.php?user1='.$userid1.'&amp;user2='.$userid2, $userid1);

/// Our two users are defined - let's set up the page

	print_header(get_string('messagehistory', 'message'), '', '', '', '<base target="_blank" />');

/// Print out a heading including the users we are looking at

	print_simple_box_start('center');
	echo '<table align="center" cellpadding="10"><tr>';
	echo '<td align="center">';
	echo print_user_picture($user1, SITEID, $user1->picture, 100, true, true, 'userwindow').'<br />';
	echo fullname($user1);
	echo '</td>';
	echo '<td align="center">';
	echo '<img src="'.$CFG->wwwroot.'/pix/t/left.gif" alt="'.get_string('from').'" />';
	echo '<img src="'.$CFG->wwwroot.'/pix/t/right.gif" alt="'.get_string('to').'" />';
	echo '</td>';
	echo '<td align="center">';
	echo print_user_picture($user2, SITEID, $user2->picture, 100, true, true, 'userwindow').'<br />';
	echo fullname($user2);
	echo '</td>';
	echo '</tr></table>';
	print_simple_box_end();


/// Get all the messages and print them

	if ($messages = message_get_history($user1, $user2)) {
		$current->mday = '';
		$current->month = '';
		$current->year = '';
		$messagedate = get_string('strftimetime');
		$blockdate   = get_string('strftimedaydate');
		foreach ($messages as $message) {
			$date = usergetdate($message->timecreated);
			if ($current->mday != $date['mday'] | $current->month != $date['month'] | $current->year != $date['year']) {
				$current->mday = $date['mday'];
				$current->month = $date['month'];
				$current->year = $date['year'];
				echo '<a name="'.$date['year'].$date['mon'].$date['mday'].'"></a>';
				print_heading(userdate($message->timecreated, $blockdate), 'center', 4);
			}
			if ($message->useridfrom == $user1->id) {
				echo message_format_message($message, $user1, $messagedate, $search, 'other');
			} else {
				echo message_format_message($message, $user2, $messagedate, $search, 'me');
			}
		}
	} else {
		print_heading(get_string('nomessagesfound', 'message'));
	}

	print_footer('none');

?>
